Question: What significant event in December of 1972 involved Harrison Schmitt?
Paraphrase: In December 1972 Harrison Schmitt was involved in which significant event?
SPARQL (Wikidata): SELECT ?obj WHERE { wd:Q108886 p:P793 ?s . ?s ps:P793 ?obj . ?s pq:P585 ?x filter(contains(YEAR(?x),'1972')) }